What’s really new about the new iPhone? Rumor has it the iPhone 5 will be thinner than the iPhone 4, but longer. Approximate measurements are 125mm by 58.5mm by 7.4mm—about 10mm more in height, less 2mm in thickness, with the same width.

The most striking feature, however, is a new rear casing – which some see as a major change – a flat metal panel, themed for the symmetrical artsy design of the iMAC. The back is almost totally made of aluminum alloy, though we’re unsure if it’s for functionality sake or for design.